For some proteins, the isoelectric point must be obtained by extrapolation because the macromolecule might not be
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For some proteins, the isoelectric point must be obtained by extrapolation because the macromolecule might not be stable over a very wide pH range. Estimate the pH of the isoelectric point from the following data for a protein:
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4.5 5.0 5.5 6.0 PH Drift speed/(um s"!) -0.35 -0.10 -0.30 -0.20
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